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Pebble-Proof-of-Concept-LUT-3D
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significantly improved code quality / readability

master
Alina Marquardt 2016-06-03 01:30:58 +02:00
parent db2aaf6827
commit f320b32a6d
1 changed files with 74 additions and 137 deletions
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src/main.c
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@ -4,22 +4,24 @@
#define ANTIALIASING true #define ANTIALIASING true
static uint8_t shadowtable[] = {192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192, \ static uint8_t shadowtable[] = {
192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192, \ 192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,
192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192, \ 192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,
192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192, \ 192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,
192,192,192,193,192,192,192,193,192,192,192,193,196,196,196,197, \ 192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,192,
192,192,192,193,192,192,192,193,192,192,192,193,196,196,196,197, \ 192,192,192,193,192,192,192,193,192,192,192,193,196,196,196,197,
192,192,192,193,192,192,192,193,192,192,192,193,196,196,196,197, \ 192,192,192,193,192,192,192,193,192,192,192,193,196,196,196,197,
208,208,208,209,208,208,208,209,208,208,208,209,212,212,212,213, \ 192,192,192,193,192,192,192,193,192,192,192,193,196,196,196,197,
192,192,193,194,192,192,193,194,196,196,197,198,200,200,201,202, \ 208,208,208,209,208,208,208,209,208,208,208,209,212,212,212,213,
192,192,193,194,192,192,193,194,196,196,197,198,200,200,201,202, \ 192,192,193,194,192,192,193,194,196,196,197,198,200,200,201,202,
208,208,209,210,208,208,209,210,212,212,213,214,216,216,217,218, \ 192,192,193,194,192,192,193,194,196,196,197,198,200,200,201,202,
224,224,225,226,224,224,225,226,228,228,229,230,232,232,233,234, \ 208,208,209,210,208,208,209,210,212,212,213,214,216,216,217,218,
192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207, \ 224,224,225,226,224,224,225,226,228,228,229,230,232,232,233,234,
208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223, \ 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239, \ 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255}; 224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255,
};
// alpha should only be 0b??111111 where ?? = 00 (full shade), 01 (much shade), 10 (some shade), 11 (none shade) // alpha should only be 0b??111111 where ?? = 00 (full shade), 01 (much shade), 10 (some shade), 11 (none shade)
static uint8_t alpha = 0b10111111; static uint8_t alpha = 0b10111111;
@ -67,83 +69,76 @@ static int32_t get_angle_for_hour(int hour, int minute) {
return (((hour * 360) / 12)+(get_angle_for_minute(minute)/12)); return (((hour * 360) / 12)+(get_angle_for_minute(minute)/12));
} }
static uint8_t un_heptet_x(uint16_t heptetindex) { static uint8_t un_heptet(uint16_t heptetindex, uint8_t *map) {
uint16_t heptoffset = heptetindex / 8; uint16_t heptoffset = heptetindex/8;
uint8_t heptet = donutsurfacemapred[heptetindex-heptoffset]; uint8_t heptet = map[heptetindex-heptoffset];
// actually don't even bother getting this right, it looks fine even without decoding the spread out heptet // actually don't even bother getting this right, it looks fine even without decoding the spread out heptet
/*if (heptetindex%8 == 6) { /*if (heptetindex%8 == 6) {
heptet = heptet =
(donutsurfacemapred[heptetindex-heptoffset-6]&0b00000001)<<6 | (map[heptetindex-heptoffset-6]&0b00000001)<<6 |
(donutsurfacemapred[heptetindex-heptoffset-5]&0b00000001)<<5 | (map[heptetindex-heptoffset-5]&0b00000001)<<5 |
(donutsurfacemapred[heptetindex-heptoffset-4]&0b00000001)<<4 | (map[heptetindex-heptoffset-4]&0b00000001)<<4 |
(donutsurfacemapred[heptetindex-heptoffset-3]&0b00000001)<<3 | (map[heptetindex-heptoffset-3]&0b00000001)<<3 |
(donutsurfacemapred[heptetindex-heptoffset-2]&0b00000001)<<2 | (map[heptetindex-heptoffset-2]&0b00000001)<<2 |
(donutsurfacemapred[heptetindex-heptoffset-1]&0b00000001)<<1 | (map[heptetindex-heptoffset-1]&0b00000001)<<1 |
(donutsurfacemapred[heptetindex-heptoffset]&0b00000001); (map[heptetindex-heptoffset]&0b00000001);
} else {*/ } else {
heptet = heptet >> 1; heptet = heptet >> 1;
/*}*/ }*/
return (heptet+16);
}
static uint8_t un_heptet_y(uint16_t heptetindex) {
uint16_t heptoffset = heptetindex / 8;
uint8_t heptet = donutsurfacemapgreen[heptetindex-heptoffset];
heptet = heptet >> 1; heptet = heptet >> 1;
return (127-heptet); return (heptet);
} }
static void update_proc(Layer *layer, GContext *ctx) { static void update_proc(Layer *layer, GContext *ctx) {
GColor bgcolor = GColorPurple;
GRect bounds = layer_get_bounds(layer); GRect bounds = layer_get_bounds(layer);
graphics_context_set_fill_color(ctx, GColorRajah); GRect texturebounds = GRect(s_center.x-64, s_center.y-64, 127, 127);
graphics_fill_rect(ctx, bounds, 0, GCornerNone); GRect bounds_mo = grect_inset(texturebounds, GEdgeInsets(9));
graphics_context_set_antialiased(ctx, ANTIALIASING); GRect bounds_ho = grect_inset(texturebounds, GEdgeInsets(23));
GRect bounds_h = bounds;
bounds_h.size.h = bounds_h.size.w;
bounds_h.origin.x -= (bounds_h.size.w-bounds.size.w)/2;
GRect bounds_mo = grect_inset(bounds_h, GEdgeInsets(19));
GRect bounds_ho = grect_inset(bounds_h, GEdgeInsets(32));
// Adjust for minutes through the hour // Adjust for minutes through the hour
int32_t hour_deg = get_angle_for_hour(s_last_time.hours, s_last_time.minutes); int32_t hour_deg = get_angle_for_hour(s_last_time.hours, s_last_time.minutes);
int32_t minute_deg = get_angle_for_minute(s_last_time.minutes); int32_t minute_deg = get_angle_for_minute(s_last_time.minutes);
// draw the watch hands that will be used as texture
GPoint minute_hand_outer = gpoint_from_polar(bounds_mo, GOvalScaleModeFillCircle, DEG_TO_TRIGANGLE(minute_deg)); GPoint minute_hand_outer = gpoint_from_polar(bounds_mo, GOvalScaleModeFillCircle, DEG_TO_TRIGANGLE(minute_deg));
GPoint hour_hand_outer = gpoint_from_polar(bounds_ho, GOvalScaleModeFillCircle, DEG_TO_TRIGANGLE(hour_deg)); GPoint hour_hand_outer = gpoint_from_polar(bounds_ho, GOvalScaleModeFillCircle, DEG_TO_TRIGANGLE(hour_deg));
// draw the watch hands that will be used as texture
graphics_context_set_antialiased(ctx, ANTIALIASING);
graphics_context_set_fill_color(ctx, GColorRajah);
graphics_fill_rect(ctx, bounds, 0, GCornerNone);
graphics_context_set_stroke_color(ctx, GColorWindsorTan); graphics_context_set_stroke_color(ctx, GColorWindsorTan);
graphics_context_set_stroke_width(ctx, whwidth); graphics_context_set_stroke_width(ctx, whwidth);
graphics_draw_line(ctx, s_center, minute_hand_outer); graphics_draw_line(ctx, s_center, minute_hand_outer);
graphics_context_set_stroke_color(ctx, GColorBulgarianRose); graphics_context_set_stroke_color(ctx, GColorBulgarianRose);
graphics_context_set_stroke_width(ctx, whwidth); graphics_context_set_stroke_width(ctx, whwidth);
graphics_draw_line(ctx, s_center, hour_hand_outer); graphics_draw_line(ctx, s_center, hour_hand_outer);
graphics_context_set_fill_color(ctx, GColorWhite); graphics_context_set_fill_color(ctx, GColorWhite);
graphics_fill_circle(ctx, s_center, whwidth/4); graphics_fill_circle(ctx, s_center, whwidth/4);
// define mapping metadata // define mapping metadata
GPoint donutoffset = GPoint(9, 42); GSize mapdimensions = GSize(125, 80);
GPoint shadowoffset = GPoint(7, 58); GPoint master_offset = GPoint(s_center.x-(mapdimensions.w/2), s_center.y-(mapdimensions.h/2)+4);
GPoint specularoffset = GPoint(40, 50); GRect mapbounds = GRect(master_offset.x, master_offset.y, mapdimensions.w, mapdimensions.h);
GRect shadowbounds = GRect(master_offset.x-2, master_offset.y+16, 122, 71);
GRect specularbounds = GRect(master_offset.x+31, master_offset.y+8, 74, 47);
GSize donutsurfacemapsize = GSize(125, 80); GColor bgcolor = GColorPurple;
GSize donutshadowsize = GSize(122, 71); GColor highlight = GColorIcterine;
GSize donutspecularsize = GSize(74, 47);
// capture frame buffer // capture frame buffer
GBitmap *fb = graphics_capture_frame_buffer(ctx); GBitmap *fb = graphics_capture_frame_buffer(ctx);
// set up texture buffer // set up texture buffer
GRect texturebounds = GRect(s_center.x-64, s_center.y-64, 127, 127);
GSize texturesize = GSize(texturebounds.size.w, texturebounds.size.h); GSize texturesize = GSize(texturebounds.size.w, texturebounds.size.h);
GBitmap *texture = gbitmap_create_blank(texturesize, GBitmapFormat8Bit); GBitmap *texture = gbitmap_create_blank(texturesize, GBitmapFormat8Bit);
uint8_t (*texture_matrix)[texturesize.w] = (uint8_t (*)[texturesize.w]) gbitmap_get_data(texture); uint8_t (*texture_matrix)[texturesize.w] = (uint8_t (*)[texturesize.w]) gbitmap_get_data(texture);
// capture texture and fill frame buffer with new background color // capture texture and fill frame buffer with new background color
for(int y = 0; y < bounds.size.h; y++) { for(uint8_t y = 0; y < bounds.size.h; y++) {
GBitmapDataRowInfo info = gbitmap_get_data_row_info(fb, y); GBitmapDataRowInfo info = gbitmap_get_data_row_info(fb, y);
for(int x = info.min_x; x < info.max_x; x++) { for(uint8_t x = info.min_x; x <= info.max_x; x++) {
if (x >= texturebounds.origin.x && y >= texturebounds.origin.y && x < texturebounds.origin.x+texturebounds.size.w && y < texturebounds.origin.y+texturebounds.size.h) { if (x >= texturebounds.origin.x && y >= texturebounds.origin.y && x < texturebounds.origin.x+texturebounds.size.w && y < texturebounds.origin.y+texturebounds.size.h) {
texture_matrix[y-texturebounds.origin.y][x-texturebounds.origin.x] = info.data[x]; texture_matrix[y-texturebounds.origin.y][x-texturebounds.origin.x] = info.data[x];
} }
@ -151,106 +146,47 @@ static void update_proc(Layer *layer, GContext *ctx) {
} }
} }
// render texture mapped around shape by looking up pixels in the lookup table // render texture mapped and shaded object
for(int y = 0; y < donutsurfacemapsize.h; y++) { for(uint8_t y = 0; y < bounds.size.h; y++) {
GBitmapDataRowInfo info = gbitmap_get_data_row_info(fb, y+donutoffset.y); GBitmapDataRowInfo info = gbitmap_get_data_row_info(fb, y);
for(int x = donutoffset.x; x < donutsurfacemapsize.w+donutoffset.x; x++) { for(uint8_t x = info.min_x; x <= info.max_x; x++) {
if (x+donutoffset.x < info.max_x && x+donutoffset.x >= info.min_x) { // render texture mapped object by looking up pixels in the lookup table
uint16_t surfindex = x+(y*donutsurfacemapsize.w)-donutoffset.x; if (x >= mapbounds.origin.x && y >= mapbounds.origin.y && x < mapbounds.origin.x+mapbounds.size.w && y < mapbounds.origin.y+mapbounds.size.h) {
uint8_t xpos = un_heptet_x(surfindex); uint16_t surfindex = (x-mapbounds.origin.x)+((y-mapbounds.origin.y)*mapbounds.size.w);
uint8_t ypos = un_heptet_y(surfindex); //uint8_t xpos = 16+un_heptet_x(surfindex);
uint8_t xpos = 16+un_heptet(surfindex, donutsurfacemapred);
uint8_t ypos = 127-un_heptet(surfindex, donutsurfacemapgreen);
if (xpos > 0 && ypos < 127) { if (xpos > 0 && ypos < 127) {
memset(&info.data[x], texture_matrix[ypos][xpos], 1); memset(&info.data[x], texture_matrix[ypos][xpos], 1);
} }
} }
} // render shadows
} if (x >= shadowbounds.origin.x && y >= shadowbounds.origin.y && x < shadowbounds.origin.x+shadowbounds.size.w && y < shadowbounds.origin.y+shadowbounds.size.h) {
uint16_t shad_index = (x-shadowbounds.origin.x)+((y-shadowbounds.origin.y)*shadowbounds.size.w);
// render shadows
for(int y = 0; y < donutshadowsize.h; y++) {
GBitmapDataRowInfo info = gbitmap_get_data_row_info(fb, y+shadowoffset.y);
for(int x = shadowoffset.x; x < donutshadowsize.w+shadowoffset.x; x++) {
if (x+shadowoffset.x < info.max_x && x+shadowoffset.x >= info.min_x) {
uint16_t shad_index = x+(y*donutshadowsize.w)-shadowoffset.x;
uint8_t shad_octet = donutshadow[shad_index/8]; uint8_t shad_octet = donutshadow[shad_index/8];
bool shad_dark = 0; bool shad_dark = 0;
if (info.data[x] != bgcolor.argb && (x+y) % 2 == 0) { if (info.data[x] != bgcolor.argb && (x+y) % 2 == 0) {
shad_dark = 0; // keep shadowless, creating dithering effect
} else { } else {
switch (shad_index % 8) { // fetch single bit out of bitfield
case 0: shad_dark = (0b10000000 >> shad_index%8) & shad_octet;
shad_dark = 0b10000000 & shad_octet;
break;
case 1:
shad_dark = 0b01000000 & shad_octet;
break;
case 2:
shad_dark = 0b00100000 & shad_octet;
break;
case 3:
shad_dark = 0b00010000 & shad_octet;
break;
case 4:
shad_dark = 0b00001000 & shad_octet;
break;
case 5:
shad_dark = 0b00000100 & shad_octet;
break;
case 6:
shad_dark = 0b00000010 & shad_octet;
break;
case 7:
shad_dark = 0b00000001 & shad_octet;
break;
}
} }
if (shad_dark) { if (shad_dark) {
memset(&info.data[x], shadowtable[alpha & info.data[x]], 1); memset(&info.data[x], shadowtable[alpha & info.data[x]], 1);
} }
} }
} // render specular highlights
} if (x >= specularbounds.origin.x && y >= specularbounds.origin.y && x < specularbounds.origin.x+specularbounds.size.w && y < specularbounds.origin.y+specularbounds.size.h) {
uint16_t spec_index = (x-specularbounds.origin.x)+((y-specularbounds.origin.y)*specularbounds.size.w);
// render highlights
for(int y = 0; y < donutspecularsize.h; y++) {
GBitmapDataRowInfo info = gbitmap_get_data_row_info(fb, y+specularoffset.y);
for(int x = specularoffset.x; x < donutspecularsize.w+specularoffset.x; x++) {
if (x+specularoffset.x < info.max_x && x+specularoffset.x >= info.min_x) {
uint16_t spec_index = x+(y*donutspecularsize.w)-specularoffset.x;
uint8_t spec_octet = donutspecular[spec_index/8]; uint8_t spec_octet = donutspecular[spec_index/8];
bool spec_white = 0; bool spec_white = 0;
if ((x+y) % 2 == 0) { if ((x+y) % 2 == 0) {
spec_white = 0; // keep highlightless, creating dithering effect
} else { } else {
switch (spec_index % 8) { // fetch single bit out of bitfield
case 0: spec_white = (0b10000000 >> spec_index%8) & spec_octet;
spec_white = 0b10000000 & spec_octet;
break;
case 1:
spec_white = 0b01000000 & spec_octet;
break;
case 2:
spec_white = 0b00100000 & spec_octet;
break;
case 3:
spec_white = 0b00010000 & spec_octet;
break;
case 4:
spec_white = 0b00001000 & spec_octet;
break;
case 5:
spec_white = 0b00000100 & spec_octet;
break;
case 6:
spec_white = 0b00000010 & spec_octet;
break;
case 7:
spec_white = 0b00000001 & spec_octet;
break;
}
} }
if (spec_white) { if (spec_white) {
GColor highlight = GColorIcterine;
memset(&info.data[x], highlight.argb, 1); memset(&info.data[x], highlight.argb, 1);
} }
} }
@ -321,3 +257,4 @@ int main() {
deinit(); deinit();
} }